Mix together the ketchup, apple cider vinegar, brown sugar and pepper.

Brush the pork tenderloins on all sides with the marinade. Let the pork marinate for 30 minutes in the refrigerator.

Heat the grill.

Salt the pork tenderloin on both sides. Grill the pork for 6 minutes on each side. Use a meat thermometer to make sure it’s cooked to 160 F.

While the pork cooks, split the rolls and brush them with softened butter. Toast the rolls on the side of the grill.

Mix the mayonnaise, mustard and buttermilk. Brush the mayonnaise on one side of the roll.

Slice the pork thinly. Place ¼ lbs of pork on each roll.

Divide the lettuce, pickles and onions and place them on each roll.

Serve the sandwiches with the LAY’S^® Kettle Cooked Jalapeño Cheddar Potato Chips.